Improvement in steam-boilers



i). LISTER.

STEAM BOILER.

No. 49,125. Patented Aug. 1, 1865.

UNITED STATES PATENT OFFICE.

DAVID LISTER, OF GARBONDALE, PENNSYLVANIA.

IMPROVEMENT IN STEAM-BOILERS.

Specification forming part of Letters Patent No. 49, 125, datedAugust 1, 1865.

To all whom it may concern:

Be it known that 1, DAVIDLISTER, of Carbondale, in the county of Luzerne and State of Pennsylvania, have invented a new and useful Improvement in Steam-Boilers; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, making part of this spec iiication, in which- Figure 1 represents a longitudinal central section of this invention. Fig. 2 is a transverse vertical section of the same.

Similar letters of reference indicate like parts.

The object of this invention is to remove the sediment of steam-boilers in an easy and sim-.

ple manner.

The invention consists in theemployment or use of a perforated pipe arranged in the interior of a, steam-boiler, close down toits bottom, and extending to all those parts from,

which the sediment is to be removed in such a manner that when a stop-cock at the end of the pipe is opened the suction created at each of the holes in the perforated pipe will carry off At the bottom or lower part of this boiler I have arranged a pipe, B, provided with a large number of small holes, a, on its under side close to the bottom of the boiler. Said pipe extends throughout the entire boiler, and over all those 'bedesirable. Byhavingtheholesa-close down to those surfaces from .which. the sediment is to be removed all impurities can be blown out.

of the steam-boiler before they are allowed to form the scale, and. with very little precaution the boiler can-be kept clean.

- It is obvious that one or more pipes may be employed for this purpose in the same steamboiler, and the diameter and shape of the pipe or pipes may be increase ordeereased, according to circumstances; butin practice it may he found desirable to use iron pipes of cylindrical form and of such diameters as are generally used in the pipes in and around the boiler. 1

I claim as new and desire to secure by Letters Patent- A pipe, B, arranged near .to the bottom or to that surface of a steam-boiler from which the sediment is to beremoved, and perforated with a number of holes, a, in the manner and for the purpose substantially asherein shown and described.

DAVID LISTER.

Witnesses I Horm'rro S. PIERCE, JAMES S'rorr. 

